20393513517 has 32 divisors (see below), whose sum is σ = 30090549888. Its totient is φ = 12204124416.

The previous prime is 20393513471. The next prime is 20393513537. The reversal of 20393513517 is 71531539302.

It is not a de Polignac number, because 20393513517 - 2¹¹ = 20393511469 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20393513537) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4792963 + ... + 4797215.

It is an arithmetic number, because the mean of its divisors is an integer number (940329684).

Almost surely, 2^20393513517 is an apocalyptic number.

It is an amenable number.

20393513517 is a deficient number, since it is larger than the sum of its proper divisors (9697036371).

20393513517 is a wasteful number, since it uses less digits than its factorization.

20393513517 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7629.

The product of its (nonzero) digits is 85050, while the sum is 39.

The spelling of 20393513517 in words is "twenty billion, three hundred ninety-three million, five hundred thirteen thousand, five hundred seventeen".